Although parents of sexual and gender minority (SGM) adolescents play a critical role in communicating about sexual health to their children, most parents have reported that they are unknowledgeable and uncomfortable talking about sexual health to their SGM adolescent. Because of the limited availability of sex education programs for parents of SGM adolescents, the study aimed to (1) describe the attitudes toward using and willingness to use a hypothetical online sex communication intervention for parents of SGM adolescents and (2) examine factors associated with willingness to use such an intervention. Parents of SGM adolescents from across the United States (N = 385) completed an online survey from March 10-16, 2023. Most participants were open to participating in a hypothetical online sex communication program and had positive attitudes toward it. Logistic regression results showed that participants who overall agreed a hypothetical online parent-based sex education intervention would be helpful and of interest had higher odds of being overall willing to participate in such a hypothetical intervention. Additionally, participants with higher income levels were also more likely to be willing to participate in a hypothetical program. Results from this exploratory study suggest that most parents of SGM adolescents have positive attitudes toward a hypothetical online parent-based sex education program and are willing to participate in it, highlighting a need to develop sex education programs tailored to the needs and preferences of parents of SGM adolescents. Additionally, equitable access to such programs is necessary especially regarding income level.